Syntax Magazine

SYNTAX

Serving Timex-Sinclair
Personal Computers

A PUBLICATION OF THE HARVARD GROUP

VOL. 4 NO. 5

ISSN 0273-2696

MAY, 1983

IN THIS ISSUE

TIMEX TO SELL REPLACEMENT PARTS FOR TS1000

8K Programs

Banner Writer . 10

Personal Net Worth.... 14

Classified Ads . 22

Dear Editor . 12

Decimal to Floating

Point Binary . 8

Hardware Review

Memotech Keyboard . 17

Sun KD-81 Keyboard . 5

News, New Products

and Services . 1,2

Program Improvements .... 3
Running MC in a String

Variable . 20

Software Tips —

Save on SAVE

and LOAD . 18

Subscription Info . 23

Vendor Report . 18

Users' Groups . .....22

The ZX/TS and 2716
45 0ns EPROMS . 7

Index of Advertisers

Biocal Software . 18

Brainchild Computer .... 10

Byte-Back Co . 8

Byte-Size Micro Tech. ..17

Discount Software . 5

Expense Cutters . 18

Ganhart/Earthling Inc.. 15
Gladstone Electronics .. 21

Kopak Creations . 19

Melbourne House . 7

Memotech Corp . 4

Pegasus Micro Systems... 5

R.I.S.T. Inc . 20

Suntronics Co, Inc . 11

Timex Sinclair User.... 16

Zebra Systems . 6

Zeta Computer . 9

You will be able to get Timex replacement
parts for your TS1000 sometime this spring.
According to Carlos Dragovich of Timex, the
Little Rock, AR, facility will sell parts and
schematics, probably by this May. Timex will
also set up an 800-number line for inquiries.

MEMOTECH 32K-TIMEX INCOMPATIBILITY REPORTED

Readers report their Memotech 32K RAMs do not
work with TS2040 printers. Memotech knows
about this problem and sent a TS2040 to its
British office for testing. Said Fateh of
Memotech told us one customer exchanged his
TS2040 for another, which does work with his
32K RAM. So far no theories on the cause.

DEFECTIVE LASERSCAN RAM REPLACEMENT AVAILABLE

Laserscan Electronics just discovered that
some of their early model 16K RAM packs,
produced until mid-January 1983, are defec¬
tive. These RAMs are green and carry the
number CB-004 on the circuit board. Laser¬
scan will replace your early model 16K RAM
free of charge. President Dennis Hawkins
says the new RAM, smaller and white, has no
reported problems. He adds you can, get a
free listing of Laser scan's ZX81 Disassembler
and Tic Tac Toe programs for an SASE. Laser¬
scan Electronics, 2305 Broadway, Riviera
Beach, FL 33404, 305/842-4255/

NORRIS ELECTRONICS BACK IN SLIDELL

We reported incorrectly that Norris Electron¬
ics moved to Metairie, LA (Apr. 83). Tracy
is at his former 144 Terry Dr., Slidell, LA,
address. Please don't call his beleaguered
relative at the Metairie number. Contact
Eileen Linker, Office of Consumer Protection,
POB 44091 Capitol Station, Baton Rouge, LA
70804-4091, 504/925-4401 for complaints.

1

NEW PRODUCTS AND SERVICES

Timex announces new 2-16K software
for kids and adults, $9.95-$19.95 ,
available in retail stores: IRA
Planner, Home Improvement Planner,
Ator the ABC Gator, Punctuation
Master, Geometry I, Algebra I and
II, Frogger and Stock Market Game.

J.V. Kane's system to measure vol¬
tages, temperatures — complete ana¬
log-digital computer systems in¬
clude 64K TS1000 with ZX printer,
assembler, disassembler, utilities,
A/D input/output routines, TV or
monitor, recorder, 8 analog inputs
and outputs with 8-bit resolution
and 2ms read time. $1000. J.V.
Kane and Co., 109 Ardmore Ave.,
Ardmore, PA 19003, 215/649-1782.

Silicon Valley North of Hammond, IN
(where smokestacks meet RAM packs) ,
offers ZX/TS education software.

Its menu-driven first program,
GRADEBOOK, is sophisticated, flexi¬
ble and friendly, says president R.
Boltuck. User club discounts.

Free catalog and simulated output
for SAE. Tape with documentation,
$7.95 plus $1 P&H. Silicon Valley
North, POB 2442, Hammond, IN 46323.

Data Storage and Display System
gives you graphing capabilities in
a data storage program. Enter data
then recall it as a tabular list or
graph. Either display gives a
summary of highest and lowest
points, closing point, file number
and title, file sum and mean score.
Menu-driven. On tape, $14.75 plus
$1.25 P&H. ZX-Panding, POB 25,
Newton, NC 28658.

Mutual Fund Advisor helps you buy
and sell no-load mutual funds. 16K
tape, listing, instructions and
sample data, $12.95 plus $1.25 P&H.
16K Compute helps you work with
math or statistics. $14.95 plus
$1.25 P&H. Both by Rolf Miller,
from Computer Engineering Services,
POB 1222, Show Low, AZ 85901.

Handy utilities from M-Ware: ZX to
ASCII code, decimal-hex-binary and
degrees-radians conversions, plot
sine, parabola and circles, and
memory remaining. Tape plus in¬
structions, $11.95. M-Ware, Garnet
Ridge Road, Rt.l, Hiram, GA 30141,
404/445-6544.

Virtuoso, a 2K music synthesis
program, offers 10-octave range,
150-note length, whole to 32nd and
dotted notes and rests. It plays
through TV, amplifier or AM radio.
Tape and instructions (includes
coding from written music for non¬
musicians), $6.95 (no P&H in US).

W. D. Maples, 688 Moore St., Dept.

X, Lakewood, CO 80215.

Find pinouts for virtually all
54/7400 TTL ICs on a single card.
Two-sided, two-color card of du¬
rable plastic covers part number,
family type, description and pinout
in compact tabular format. $5.95
plus $1 P&H. Micro Logic Corp.,

POB 174, 100 Second St., Hacken¬
sack, NJ 07602, 201/342-6518.

SL-6 Shift lock kit for ZX/TS/
MicroAce computers gives one-finger
typing. Tap the adjustable touch-
sensitive contact and SHIFT key
holds for 3-5 keystrokes. LED in¬
dicates SHIFT on. Kit (SL-6 mod¬
ule, capacitor, LED) $17.46 ppd
first class. BC-80 blinking cursor
module for ZX80S causes normal and
syntax error cursors plus various
graphics to blink, $17.46 ppd. 1st
class. Kaltek Calculator Technolo¬
gy, Box 7462, Rochester, NY 14615,
or Box 971, Adjuntas, PR 00601.

Design and print upper/lower case,
special foreign language letters,
or any new characters. 20K program
requires 64K RAM and ZX printer.

On tape with two keyboard overlays
and instructions, $22.50 money
order or check (five-week delivery
on check orders). J.J. Castillos,
POB 7274 Station A, Toronto, Ont.
Canada M5W 1X9.

2

Two new program listings: Madame
Ruby simulates artificial intelli¬
gence in matters of life, love and
health. 16K listing, $5. Arcade
games package gives two 16K list¬
ings, Tic Tac Toe and Tank Zap.

$3. Florida Creations, POB 16422,
Jacksonville, FL 32245.

See those bats and dragons with new
animated adventure game, Caves of
Zulu. Needs 16K RAM. $19.95 plus
$2 P&H. Stuart Software, 25381-G
Alicia Pkwy., Suite 316, Laguna
Hills, CA 92653, 714/855-4753.

Build a 16K RAM for $39.95, option¬
al plastic case $4.95. Assembled
16K RAM $44.95. Add $2.95 P&H, FL
residents add 5%. 90-day warranty,
layaway available. Laserscan Elec¬
tronics Corp., 2305 Broadway, Riv¬
iera Beach, FL 33404, 305/842-4255.

Personal Weight Control Program
helps tailor and monitor your diet.
Tape and guide available from IPS
distributors for $29.95. Interna¬
tional Publishing and Software,

3952 Chesswood Dr., Downsview, Ont.
Canada M3 J 2W6, 416/636-9409.

Working Mother's Dilemma offers
four 2K games: Mad Dash, Carfool,
Harried Housewife and Shopping
Mall. $14.95 (CA residents add
6%). 2-Bit Software, POB 2036, Del
Mar, CA 92014, 619/481-3629.

The SoecialWare Directory lists
instructional, administrative, pro¬
fessional and evaluation software
for special education. Expect some
but not lots of ZX/TS software, out
late May. LINC, 1875 Morse Rd.,
Suite 215, Columbus, OH 43229,
614/263-2123.

Sell your programs through on-line
referrals to software publishers.
Listing and one program category,
$20, extra categories $5 each.

Blind box service $10. Program¬
mers' Pipeline, POB 666, Glendora,
CA 91740, 213/914-4317.

PROGRAM IMPROVEMENTS

Here's a more efficient way to sim¬
ulate ON GOTO statements (Feb. 83).
Look at this short program:

To adapt it ^change line_30_to:

This line directs the computer to
the designated line numbers when an
A value matches. When A does not
equal a listed value, the computer
goes to line 0. Thus, the last
part (40 AND A<1 OR A>4) sends the
computer to the next line number.

Carl Bush, Baltimore, MD

Joe Glass noted his program Office
Manager (Apr. 83) gives an error 5
when you view files. Add:

George T. Milonas, Tacoma, WA

In Office Manager, menu choices 3
and 9 incorrectly imply you can
alter phone book and report files.
The word "ALTER" should read "ADD."

To alter files, add this line:
2906 PRINT L

When you choose menu item 12 the
slot number prints before the line.
Then enter in the immediate . mode:
LET F$ (slot) ="altered information"
GOTO 2900

Also, the program cannot reach
line 250; it serves no purpose.

R.B. Mason, Arlington, VA

3

TIMEX MAKES THE

COMPUTER,

BUT WE MAKE IT TICK.

If you own a TS-1000 or ZX-81 computer and want to bring out the power within it, you’ll want Memotech. From easier input to high
quality output and greater memory, Memotech makes the add-ons you demand. Every Memotech peripheral
comes in a black anodized aluminum case and is designed to fit together in “piggy back” fashion enabling you
| I to continue to add on and still keep an integrated system look. . .

MEMOPAK RAM All Memopak RAMs are directly addressable, user transparent, are neither switched nor
paged and no additional power supply is required. You can also choose the Memopak RAM which is just
right for your needs. From economy to power. 16K RAM The Memopak l6K RAM is the most
economical way to add memory to your TS-1000. It is fully compatible with the Timex or Memotech l6K
RAMs to provide you with up to 32K of RAM. The 16K RAM also offers additional add-on capabilities
through its “piggy back” connection. 32K RAM The 322K Memopak enables you to execute
sophisticated programs and store large data bases and like the 16K RAM is fully compatible with Timex’s or
Memotech’s 16K RAMs to give you a full 48K of RAM. 64K RAM The 64K Memopak is powerful
| - enough to turn your TS-1000 into a computer with capabilities suitable for business and educational use. It

I _ I accepts such BASIC commands as 10 DIM A (9000). MEMOCALC Memocalc, our spreadsheet analysis

software, enables TS-1000 users to perform complex number crunching routines with ease. With i -

the 64K RAM a table of up to 7000 numbers with up to 250 rows or 99 columns can be specified.

Quick revisions can be achieved by entering new data to your formula.

MEMOTECH KEYBOARD For ease of operation, the Memotech keyboard is a high quality
standard typewriter keyboard, with TS-1000 legends. The keyboard is cable connected to a buffered

interface which is housed in a standard Memopak case and plugs directly into the back of the ' - — — ^ -

I ~ I TS-1000 or other Memopaks. MEMOPAK HRG The Memopak High Resolution Graphics, with

up to 192 by 248 pixel resolution, enables display of high resolution “arcade game” style graphics
through its resident 2K EPROM, programmed with a full range of graphics subroutines.

CENTRONICS PARALLEL AND RS232 INTERFACES | - —

Memotech’s Interfaces enable your TS-1000 to use a wide range of ill

1 — • " . I compatible printers. The resident software in the units gives the '

complete ASCII set of characters. Both Memopak Interfaces provide lower case character capabilities and
up to 80 column printing. The RS232 Interface is also compatible with modems and terminals.

SEIKOSHA GP IOOA PRINTER The Seikosha GP 100A uses a 5x7 dot matrix printing format with

ASCII standard upper and lower case character set. Printing speed is 30 characters/second with a *“ — ■ — - — - — — — 1

maximum width of 80 characters. The printer uses standard fanfold paper up to I I

9-1/2 inches wide. The GP 100A is offered as a package including cable and I code: stx-5 , 1

■ 1 interface. Other printer packages are also j , - — — j

rwwi available through Memotech. |32kram _ 99^5 _ I

ORDER AT NO RISK. All Memotech I MKRAM _ ww ' _ I

products carry our 10 day money back |

guarantee. If you’re not completely j High Resown Graphics "99.95

satisfied, return it within ten days and we j Centronics Parallel Interface 74.95

I will give you a full refund. And every | 18232 lnterface - ^ _

fe Product comes with a six j - ZS~

i - - — - — — . month warranty. Should anything be * Shipping and Handling 4.95 $ 4.95 |

defective with your Memotech product, return it to us and we will repair or replace I Thx (Colorado residents only) |

it free of charge. Dealer inquiries welcome. To order any Memotech product use - — - - - 1

the order coupon or call our toll-free number 800 / A62-OQ4Q I

J J * . □ check □ MasterCard □ Visa

TS-1000 is a registered trademark of Timex Corp.

m

m 1|

_ aiiiii

CORPORATION

7550 West Yale Avenue, Denver, Colorado 80227, 303/986-1516, TWX 910-320-2917

| 16K RAM

$ 49.95

| 32KRAM

99.95

| 64K RAM

149.95

| Memocalc

4995

1 Keyboard with Interface

99.95

1 High Resolution Graphics

99-95

1 Centronics Parallel Interface

74.95

, RS232 Interface

99 95

| Printer Cable

1995

] GP 100A Printer Package**

39900

* Shipping and Handling

4.95

$ 4.95 |

1 Thx (Colorado residents only)

1 TOTAL $

• *A11 prices quoted in U.S. dollars. Prices and specifications subject to change without notice. |

| **Please add an additional $5.00 for printer shipping charges.

| □ Check □ MasterCard □ Visa

1 Account No.

Exd.

1

! \ >

« Name

1

Phone number

j Address

State

HARDWARE REVIEW

Product: Sun KD-81 full-size

keyboard conversion for
the ZX/TS

From: Suntronics Co., Inc.

12621 Crenshaw Blvd.
Hawthorne, CA 90250
Price: $69.95 plus $4 (P&H)

CA residents add 6%

"Easy to install — no soldering,
no modifications," said the ad.
Guess what? It was right!

In five minutes I felt like a
professional programmer, efficient¬
ly inputting on a fast, full-sized
keyboard. Installation is easy:

1. Remove three screws under foot
pads securing ZX/TS case and two
screws holding ZX/TS PCB. Remove
the bottom case, then the two
screws holding the top case.

2. Unplug the two ribbon cables
from the ZX/TS keyboard.

3. Attach the PCB to the KD-81
case with four screws and washers.

4. Plug the two ribbon cables from
the KD-81 keyboard into the KD-81
keyboard case.

5. Close the case and install the
remaining four screws in the bottom
of the KD-81 case. (All screws and
washers are supplied.)

You get a professional-looking
full-size keyboard with 41 keys,
including a full-size space bar and
shift keys on both sides of the
keyboard. Keytops spell out com¬
mands and illustrate graphics for
easy entry. Two colors make the
keys easy to read. High-impact
black plastic and vaporized metal
shielding enclose the keyboard.

I like the unit's close resem¬
blance to the original keyboard;
following the ZX/TS manual is easy
as pie. The new shift key where
the space key was and the full-size
space bar make touch typing con¬
venient and comfortable.

I highly recommend this prod¬
uct to Timex Sinclair users.

Daryl Faulkner, Fountain Valley, CA

5

ZEBRA JOYSTICK ADAPTOR

joystick action games]

Allows you to connect any Atari compatible joystick to your ZX81 or TS1 000

8 DIRECTIONS
& FIRE
CONTROL

6 JOYSTICK GAMES $9.95
ATARI JOYSTICK $6.50
ADAPTOR $19.95

The ZEBRA Joystick Adaptor comes
assembled and tested with simple
instructions to make joystick
versions of most action games.

Use your own Atari compatible
joystick or add $6.50 for a
genuine Atari Joystick.

15 DAY MONEY BACK
GUARANTEE

EXPANSION
CONNECTOR FOR
YOUR MEMORY,
PRINTER, ETC.

SIMPLY
PLUG IT
IN.

ACCEPTS ANY
ATARI-COMPATIBLE
JOYSTICK ^

ONLY

$19.95

WITHOUT SPEAKER

$24.95

WITH SPEAKER

BLIPPO

EXPANSION

CONNECTOR

Add amazing sound effects to your games.
Easy to program in BASIC.

Wide frequency range.

Assembled and tested, with Demo software

ZEBRA LIGHT PEN

• Fun to experiment in BASIC

• Complete package includes
-Light Pen

-Computer Interface Module
-Demo Program Listings

• Assembled & Tested

ORDER C109 $24.95

AMAZING
SOUND EFFECTS

SPEAKER

MODULE

SUPERGAMES

PROTOTYPING?

EXPERIMENTING?

30

MONSTER

MAZE

Cl 13
$14.95

cm

UNIVERSAL
PATTERN FOR
IC’S, CAPS,
ETC.

C102 BYTING DEEPER INTO YOUR TS1000 . . .
C103 NOT JUST 30 PROGRAMS FOR THE ZX81
C104 COMPLETE T/S BASIC COURSE .

Cl 12

PIGGY BACK
RAM OR OTHER
PERIPHERALS

C110

ALL SIGNALS
LABELED

GOBBLE

MAN

Cl 14
$14.95

C110 Keyed & Labeled ZX Connector $5.95
C111 Universal Prototyping Board . . $9.95
Cl 1 2 Expansion Connector . $2.50

C105 UNDERSTANDING YOUR ZX81 ROM ... .
C106 MACHINE LANGUAGE MADE SIMPLE . . .
C107 THE INS & OUTS OF THE TS1000 & ZX81

IMPORTANT! All ZEBRA products
can be piggybacked in any order.
Your memory, printer, etc. will plug
into the last one.

Order Toll Free
800-221-0916

15 DAY MONEY BACK
GUARANTEE ON ALL
ZEBRA HARDWARE.

Tech Info & NY State call
(212) 296-2385 9-5 EST

ZEBRA SYSTEMS, INC

ADD $2.00 PER ORDER
FOR SHIPPING.

WE ACCEPT VISA, MASTERCARD,
CHECKS, M.O.

COD. ADD $3.00 EXTRA.

NY RESIDENTS ADD SALES TAX.
OVERSEAS, FPO, APO, ADD 1 0%.
DEALER DISCOUNTS AVAILABLE.

78-06 Jamaica Avenue, Woodhaven, New York 11421

THE ZX/TS AND 2716 450ns EPROMS

You may run into trouble using
450ns 2916 EPROMs on your ZX/TS.
Though the PROM programs and veri¬
fies in the programmer, it won't
function. The problem results from
inadequate speed — the EPROM must
respond in less than 427ns; most
2716s offer 450ns response.

Let's examine an operating tim¬
ing cycle to see where the problem
lies, then look at available solu¬
tions. You'll see why you can pro¬
gram and verify a 450ns EPROM, but
you cannot use it.

Consider all Z80 CPU instruc¬
tions in a ZX/TS computer as a se¬
quence of basic machine operations.
The most fundamental of these is an
operation-code fetch (OFC) , called
machine cycle 1 or simply Ml. With
this operation the CPU fetches the
instructions to execute from the
program stored in memory.

Each machine cycle is divided
further into a series of T states.

For example, the basic Ml cycle
consists of four T states. The
processor's frequency (3.25 MHz for
the ZX/TS's Z-80A) determines the
length of each T state. So each T
state's period is 1/3.25 micro¬
seconds or 308ns.

Examining an OCF timing dia¬
gram, we see that MREQ NOT goes low
halfway through the first T state
and that the CPU reads the data on
the bus with the rising edge of the
third T state. Ideally then the
memory device has only 3/2 T states
to get ready to be read in an Ml
OCF operation if the MREQ NOT sig¬
nal is used in the device's address
decoding (as is usual). This time
amounts to 462ns.

Unfortunately, propagation de¬
lays through the decoder used to
select the particular memory device
reduce this time. Each LSTTL gate
used delays the device select sig¬
nal by about 5ns. For example, an
MREQ NOT signal might be delayed
about 35ns when delivered through

At last a reference manual
which covers all the hardware

_ aspects oftheTS 1000 -includes

fSldOO |comP*ete circuit diagrams!

Orders to: MELBOURNE HOUSE SOFTWARE

Dept. CS 347 Reedwood Drive, Nashville, TN 37217

Dealer orders and queries: 800/251-5900
(ask for a Melbourne House operator)

Visa and M/C orders

can be phoned in: 615/361-3738

BOOKS:

25895 The Complete Basic Course $34.5

25957 Machine Language Programming

Made Simple $14.9

20922 The Complete Timex/Sinclair

ROM Disassembly $19.9

26025 Not Only 30 Programs $9.9

25913 Understanding Your ZX81 ROM $14.9

□ 51539 InsandOuts $12.9

TAPES:

13941 Gamestapel:llPrograms-lK $14.9

n 13942 Gamestape2:3Games-i6K

13943 Gamestape 3: Catacombs
Adventure-16K

1 3944 Gamestape 4: 3D Monster Maze -16K

13945 Gamestape 5: 3D Orbiter-l6K
26446 Space Trek -16K

26359 Super invasion -IK
[ 26318 WallBusters-IK

□ 26472 10 Exciting Programs-lK
r 26284 Reversi-IK

26406 TOOlbOX-IK

26490 Basic Course 2 cassette pack

□ 14026 Combat Flight-16K

TOTAL: $_
Residents of ca, md, tn

please add sales taxes: _

Add $2 for Shipping & Handling,

foreign orders add $6: _

Enclosed is my check or money order for $ _

Please charge my Visa or MasterCard card#.
Signature _

expiration date.

MELBOURNE HOUSE SOFTWARE

two halves of a 74LS139 decoder.

The time available to the memory
device is therefore reduced to 462
minus 35ns, or 427ns.

Maximum CE NOT to output delay
(tpE) of a 2716 450ns EPROM is
450ns. Some offer an access time
lower than 450ns but others are
near the limit. Using 450ns EPROMs
in a system running at 3.25 MHz is
therefore marginal at best.

You have two options: use
EPROMs with a shorter access time
(you can now get single 2716-1
350ns EPROMs for $4.50), or insert
a wait state into every Ml cycle,
increasing the time available to
the memory device by one T state to
769ns (ideally). See Figure 1.

Ordinary memory read opera¬
tions add an additional half T
state before the CPU samples the
data on the bus. In other words,
the memory device has 615ns to get
ready. This extra delay can lead
to the frustrating phenomenon of
being able to verify a 450ns EPROM

MODULES FOR:

TIMEX-Sinclair

MODEM $119 .95 (RS-232) Port & Software

$149." ASSEMBLED

Included)

64-K MEMORY $129.??T

the “ULTIMATE MEMORY"
FEATURES: $139.K ASSEMBLED

• Battery backup K .

• PROM/ROM socket

• Reset Switch

_ * • BYTE-BACK EXCLUSIVE FULL 64-K

The 0-8K area is available. You can execute a copy routine (provided) to
copy the TIMEX ROM into the 0-8K area of RAM then flip a switch and you
have your operating system in RAM. You can modify it and create your
own customized operating system.

WHY PAY MORE FOR LESS FEATURES?

GET THE “ULTIMATE MEMORY" BYTE-BACK UM-64

A COMPANY YOU CAN DEPEND ON

BYTE-BACK CO. is the oldest and one of the world’s largest
suppliers of modules for the ZX81 and TIMEX-Sinclair 1000
computers. There are thousands of BYTE-BACK modules in use
with a track record of proven reliability.

RS-232 PRINTER INTERFACE Only $59.** KIT $69.“ ASSEMBLED
CONTROL MODULE 8 Relays, 8 Inputs, $59.95 KIT $69“ ASSEMBLED

16K MEMORY UM16 $59.95 kit $69.k assembled & tested.
Battery backup, reset switch, PROM/ROM socket PLUS. . . .

1 year, 100% trade-in credit towards the UM-64.

BYTE BACK CO. [ 1 3

Rt. 3, Box 147, Brodie Road lLZ,5r |

Leesville, S.C. 29070 _ ®

ORDER PHONE 803-532-5812 PfjgP T7T?

Add $4.95 shipping & handling to all orders. ■■■■*!''-■' X_y|

90 Day Warranty On All Modules. 10 — Day Return Priviledge

with your ZX/TS EPROM programmer,
but being unable to use it.

Paul Hunter, Okemos, MI

This circuit is not implemented in
Hunter's non-volatile RAM. — AZ

Figure 1. adding one wait state to an mi cycle

Schematic courtesy Zilog Inc.

+5 to pins 14, 13, 10, 1 of 7474
0V to pin 7 of 7474

DECIMAL TO FLOATING POINT BINARY

John Bowden describes an inter¬
esting pencil-and-paper procedure
to convert decimal numbers to ZX/TS
floating point binary (Jan. 83).

His procedure works fine, but
is slow and can only handle posi¬
tive integers smaller than 2**32.
Your ZX/TS ROM has a number conver¬
sion routine that is faster, not as
limited and easy to use. You can
even use it in command mode:

These three commands display a list

of decimal values of the five bytes
for number n, in Sinclair-type
floating point format. But this
routine requires a lot of typing to
convert one number.

It works by assigning a decimal
number to the variable X0X, the
last item stored in the variables
area of program memory. The last-
defined variable is always located
just before the address held in
system variable E_LINE. The second
command PEEKS E_LINE to get the
address. The third command backs
up from that address and displays
bytes containing the floating point
number, exponent byte first, fol¬
lowed by the mantissa (decimal part
of a logarithm) bytes in order of
decreasing significance.

Yet, a BASIC program modeled
after the preceding command se¬
quence gives problems — primarily
insuring X0X is always the last-
defined variable. Avoid this prob¬
lem by using the variables start
area marked by system variable
VARS, rather than the variables end
area marked by E_LINE.

Listing 1 shows 11 lines you
can use to start any program need¬
ing decimal to binary conversion.

To use this program assign the
decimal number (or numeric expres¬
sion) to variable X0X, and then
GOSUB 50. When executing the pro¬
gram by RUN or GOTO, line 10 clears
the variables area of program memo¬
ry. Thus, variable X0X initially
gets the value 0 and becomes the
first-defined variable. System
variable VARS always holds variable
X0X's address.

On executing a program line
that assigns a value to a variable,
the computer automatically converts
the value to floating point binary
form and stores it that way. Line
50 gets the X0X address from VARS.
Lines 60-68 put each byte of the
binary number into its own varia¬
ble. After the subroutine returns,
the main program can do anything it
likes with the information, held in
variables ZlZ to Z5Z.

ORGANIZE and PROTECT your VALUABLE
software library the COLORFUL way with
ZETAPAKS™ from ZETA Computer.

Mix n' match your collection with these rugged-vinyl
software "safes" in a choice of 4 COLORS. Now you can
store your media TOGETHER with your instructions on the
SAME shelf with your computer books.

$3.50 EACH or
$38.95 Per DOZEN
Postpaid

-COLORS-

BEIGE

TAN

BLUE

YELLOW

HOLDS ALL TYPES OF SOFTWARE MEDIA

Besides holding a 6" * 8V2" manual up to Vi
ZETAPAK can hold 2 audio/digital cassettes

thick, a

or 2 stringy floppy cartridges
or 2 of the new 3" micro disks
or 6 514" floppy disks
or 2 ROM cartridges (up to %" thick)

Ask you local computer dealer to stock ZETAPAKS or
ORDER DIRECT: ZETACOM Dept. SX
P.O. BOX 3522
GREENVILLE, SC 29608
‘Specify how many of what color.

‘Send Bank or PO Money Order for fastest service.

‘COD is fast but $2 extra. ‘Please allow 4 weeks delivery on checks.
‘Foreign: US Funds add .50 each for Air Mail. ‘Purchase Price of
$3.00 each ZETAPAK REFUNDABLE if returned unopened within
30 days. ‘SOFTWARE PUBLISHERS/DEALERS write or call for
discount schedule. ..(803) 246-1 741 after 1 P.M. EST.

© tm 1983 ZETA Computer

This conversion routine uses
unique variable names to minimize
inadvertent re-use of the same
names later in the main program.
Reusing variable names won't bother
the conversion routine, but the
main program might go berserk.

This routine is reasonably
fast, and can convert any number —
positive, negative, fractional, or
any ZX/TS numeric expression.

C.C. Stadler, Orlando, FL

Listing 1.

9

CHANGE YOUR

TIMEX/SINCLAIR 1000 DISPLAY
TO FULL COLOUR GRAPHICS

with

KOLORWORKS

LOOK AT THE FEATURES ! ! !

* Plugs into ZX81/1000 (edge connector)

* All text will run on the color tv

* Module contains it's own memory

* User defined characters & graphics up to

256x192 pixels

* Latest technology with TM S991 8 V DP

(32 sprite levels)

* Module contains extension of basic commands

including: PAPER /IN K/BOR D ER /B I N /
SPRITE/OUT/INP / etc.

for $149.95

Use your KOLORWORKS immediately with a
game cassette for $9.95

This delightful game is designed for hours of fun using some
of the color graphic capabilities of KOLORWORKS. The
cassette also contains a short program to familiarize you
with some of the commands and graphics.

MAIL TO:

BRAINCHILD COMPUTER WORKS, INC.

P.O. Box 506
Pewaukee, Wl 53072

Price + Qty. _ Amount

KOLORWORKS

$149.95

CASSETTE

9.95

Shipping and Handling

4.95

$4.95

Wi. Res. add Sales Tax

My EH check EH money order enclosed

TOTAL

Name

Street _

City _ State _ Zip _

Please allow six to eight weeks for processing. Thank you.

For further information - Send $2.00 (credited to order)
WATCH FOR:

"GAAMWORKS" -

Joystick Ports / Sound / Cartridge Slot

BANNER WRITER — 8K/2K

Now that Timex's 2040 printer
is available, why not use it to
make computer-generated banners?

BANNER WRITER prompts you for
a message, then PEEKS into the ROM
to get each individual letter. It
blows it up to 32x normal size,
turns it sideways, prints it on the
screen, then copies the screen to
the printer one letter at a time.

Line 130 controls the back¬
ground — try another value. STEP in
line 70 and variable G in the FOR-
NEXT loop control the height and
thickness of the lines. In line
180, try using CH (from line 55) in
place of CNTR. Generate inverse
characters by swapping values in
lines 130 and 150. Switching the
order of A and B in line 180 ro¬
tates the letter another 45
degrees — upside down.

Enter any length message.

Each character takes about 35 sec¬
onds in FAST to generate and print.
Press RUN, ENTER to create another
message; BREAK exits.

Joseph P. Williamson, Timex Users'
Group, Gainsville, FL

lO

FULL SIZE KEYBOARD
CONVERSION

FOR
YOUR
ZX-81/

TS-1000

Fully Warranteed
For 90 Days!

SUN KD-81

If you're tired of not knowing whether your data got entered or tired of pok¬
ing data in with one or two fingers, then it’s time to upgrade your ZX-81 to
a full size, professional keyboard. The SUN KD-81 KEYBOARD offers all
the ease and comfort of imputting your programs and text on a fast and ef¬
ficient professional-sized keyboard!

KD-81 FEATURES

INSTALL

• No Soldering

• No Modifications

• Full size keyboard with 41 keys

• Two color silk-screened key tops
for easy reading

• Key tops have commands and
graphics spelled out the same as
ZX-81

• Extra shift key for real keyboard-
style typing

• Full size space bar

• Allows touch typing

• Rear cutout allows any RAM or

expansion module to be plugged
in

• Keyboard comes with own cables

• Keyboard case holds both
keyboard and computer with room
to spare

• High impact plastic case with
vaporized metal shielding

• Easy assembly — no soldering,
no modifications

• Measures 10%" x VU" x Th"

GET A BETTER PICTURE WITH SAMWOO

FOR YOUR SINCLAIR COMPUTERS

The SAMWOO provides a much better picture than your TV
monitor. Includes easy-to-follow instructions for a simple
modification. .

9" 18Mhz BANDWIDTH 12" 12Mhz BANDWIDTH

Green . $121.00 Green . $130.00

Orange . 125.00 Orange . 134.00

Add $7.50 Shipping and Handling for this item.

MONITORS

Features:

• Composite Video
Input/Output

• Switchable Input
Impedance 75 or
10K ohm

• 750 Line Resolution
at Center and 500
Lines at Corners

• Dimensions are
12.13" x 11.34" x
11.65" for the 12"
model and 8.66" x
8.54" x 9.05" for the
9" model

Check out these
simple
’nsta*‘
lation
J steps!

1. Remove 4 screws securing ZX-81 case
and remove 2 screws holding ZX-81 PCB.

2. Unplug the 2 ribbon cables from the
ZX-81 keyboard.

3. Plug the 2 ribbon cables into the con¬
nectors on the KD-81 keyboard.

4. Attach the ZX-81 PCB to the KD-81
case with 2 screws, close case and install
remaining 4 screws into the bottom of the
KD-81 Keyboard case ...

And enjoy the comfort and
ease of inputting your data
on a full size keyboard!

SUmONICS CO., INC.

12621 Crenshaw Blvd., Hawthorne, CA 90250

STORE HOURS: MON.-FRI. 9:00 am to 6:00 pm
SATURDAY 10:00 am to 5:00 pm

CALIFORNIA OUTSIDE CALIFORNIA TOLL FREE

213-644-1149 1-800-421-5775

(for Tech Info and Calif, orders) (Order Desk Only)

Mail Order — Minimum Order $10. Send Money Order or Check to P.O. BOX 1957 —
DEPT. B, HAWTHORNE, CA 90250. VISA or Mastercard (please include expiration
date). Add $4.00 postage and handling to order. CA residents add 6% sales tax.

DEAR EDITOR:

I am developing an interactive
educational program. Unfortunately
we are in a rural area at the very
end of REA power lines over 20
years old. The system inflicts
frequent drop outs and power fail¬
ures, real disasters after five
hours of programming.

So I recently built a 15V regu¬
lated power supply and wanted a
convenient package. I combined it
in the same case as the battery
back-up unit in SYNTAX, Aug. 82.

I built the full system as de¬
scribed, including filter cap and
LED power indicator, but added a
DPST power switch to control AC and
output power (DC). I found with a
switch controlling AC only turned
off, the battery pack still
supplies DC to the computer. I
didn't want to unplug my ZX81 each
time I shut down; now a simple
double pole switch does the job.

I housed the unit in a larger
chassis (Radio Shack 270-269), and
used both new and scavenged parts.

My system works perfectly, with
a total improvement cost (excluding
power supply built earlier) under
$20. A small price for peace of
mind and non-disappearing programs.

Joseph Dominiecki, Wisdom, MT

If your printer copies the ZX/
TS printer buffer at address 16444
or 403CH, you have this problem:

Any floating point number with more
than one and fewer than five lead¬
ing zeros (.01-. 00009) prints gar¬
bage for the second through last
leading zero.

The Print-Ch routine at 07F1H
carefully preserves the contents of
the CPU's A register when printing
to the screen. When the LPRINT
flag is set, the Print-Ch routine
falls through to the LPRINT subrou¬
tine at 0851H. This subroutine
fills the buffer with Sinclair
character code to output to the
printer. Lprint-Ch leaves the A

register loaded with the value of
PR__CC (counter for the printer
buffer). The print-a-f loating-
point-number subroutine at 16B2H
outputs a decimal point, a zero,
and loops up to four times, causing
it to print leading zeros. The
code for zero is stored in the A
register. When this loop returns
from Lprint-Ch, the A register is
not set back to zero.

Put the ROM onto EPROM (as in
John Oliger's EPROM project, SQ,
Winter 82), changing ROM address
16BCH to FBH. Now the loop starts
from the point where the A register
is set to zero, correcting the bug.

Mike Wagner, Waukesha, WI

About a month ago I bought
Sinclair's VU-FILE program, and it
works well. I want to use Personal
Software Services' QSAVE package
with it, but your Nov. 82 QSAVE
review says that it will not work
with self-running programs, nor
with those that are saved by name.
Since VU-FILE has both these fea¬
tures, I have not been able to
eliminate them. How do I modify
VU-FILE to use it with QSAVE?

Paul Crecca, Tonawanda, NY

Load it up and get to the main
menu. Hit BREAK to get to the
BASIC listing. From here you can
change the lines for saving to use
QSAVE's USR call, or leave the old
ones (put a REM in front of each to
inactivate it) and add new ones for
QSAVE . — AZ

Is it true that Sinclair's
disk drives are only sequential
access and not random access, due
to Sinclair BASIC? As a TS1000
owner, do I have any hope?

Ralph Hilton, Salt Lake City, UT

Sinclair Research in Boston says
the "disk drive" about to appear in
the UK is really a stringy floppy.

12

It runs a continuous loop tape, not
a true disk. Thus its 3.5 second
access is sequential. Sinclair's
Microdrive, designed for Spectrums,
will not work on ZX81s or TS1000S
without a special interface. Timex
may offer an inexpensive ZX/TS-
compatible disk drive, but not in
the immediate future. — AZ

Freak your system out without
using POKE or USR. Run this pro¬
gram, then try to edit a line.

Even CLEAR won't return it to
normal .

10 GOSUB 20
20 GOTO 10

The system does not catch the re¬
sulting stack error in time.

Dean A. Cuadra, Los Angeles, CA

I want to mention the fine
service I received from People's
Computer Supply. On Mar. 16, I or¬
dered a Memotech Centronics Printer
Interface from them. On Mar. 28 I
had the unit — not much more than
travel time both ways. In addition
to the fast service, they notified
me that the price went down and
reduced my charge. Service like
this deserves praise.

In contrast, CAI Instruments
has yet to provide a Stringy Floppy
and CAI/O board ordered Jan. 31 (8
1/2 weeks ago as I write). When I
call, I am told they'll go out
"this week" or "tomorrow." Besides
the slow service, CAI charges $10
more than its current ad states.

James R. Shoaf III, Santa Clara, CA

Thanks to Jon Harder for his
low-cost, low-tech approach to
solving the ZX/TS desktop tangle
problem (Mar. 83). Two suggestions
for lowering cost and improving
results: First, ask for a correct

sized scrap of finish-quality ply¬
wood at the lumber yard. Interior/
furniture grade plywood looks good
and won't cup (warp across the
grain). I got a piece of white

pine ply (10x16x3/4") for $1.25.

Second, for the switched ex¬
tension cord, get a feed-through
switch ($.99-1.25) at the hardware
store, then dig up a spare exten¬
sion cord. Put the switch exactly
where you want it for easy reach.
You can easily install one in five
minutes with just a jackknife and a
screwdriver .

Bob Rettew, Derry, NH

I bought a Byte-Back M-16 RAM
module kit, which I highly recom¬
mend, in April 1982. I had no
problem with assembly and operation
until I bought a Timex tape. It
wouldn't load. After lots of frus¬
tration, I called Byte-Back. They
asked if the program contained any
machine code (it did), then told me
I needed a modification.

They told me to cut the trace
from IC U3 pin 9 to IC U14 pin 9,
then tie pins 9 and 10 of IC U14
together. Since the mod I've had
no more loading problems.

Like many others, I have some
problem with RAM crashes. While
troubleshooting my RAM for the
loading problem, I noticed that
touching my logic probe to pin 21A
on the RAM edge connector caused
the RAM to lose its contents. The
schematic showed that pin 21A is a
not RESET and my probe showed it
was floating. So I tied pin 21A
high using a 10K resistor to the 5V
supply. This eliminated about 95%
of my RAM crash problems.

Sidney E. Parker, Newark, CA

I found an ad in January's
Creative Computing for Arkay En¬
gravers, 2073 Newbridge Rd., Bell-
more, NY 11710, 516/781-9859, for
keytops. I have never done busi¬
ness with them.

Steven Rohall, Pittsburgh, PA

Contact Ken Kaplan of Arkay for
info on ZX/TS keytops. — AZ

13

PERSONAL NET WORTH — 8K/16K

Do you wonder if you will ever
"get ahead" financially? Personal
Net Worth keeps track of your per¬
sonal finances and figures your
current net worth.

It calculates, stores and plots
your net worth for 14 years. The
table option shows yearly total
assets, liabilities and net worth.

Once the array is full, the
program lets you add years by de¬
leting the oldest year. With this
routine, you don't need to reenter
data in new array locations.

Lines 4000 on tell you how to
initialize the program. DIMension
each variable in line 4010 by pre¬
ceding it with DIM and pressing
ENTER. For lines 4020 on precede
each variable with LET and enclose
words in quotes. For example, LET
N$="NET WORTH" (ENTER). In line
4030, LET A(l,l) equal the 4-digit
year you want to start with, no
quotes necessary. (Delete lines
4000-4060 after initializing to
save memory. — AZ)

To start, GOTO 10. Pick func¬
tion 3 to SAVE. After reloading,
the program self-executes to reduce
the risk of clearing data. After
entering data, do not RUN or you
lose all data entries including
initialization .

Lines 2080-2130 automatically
scale the graph. If the current
range of numbers doesn't fit your
situation, change the values.

To print the table out, change
PRINT in lines 2390-2450 to LPRINT
(or comparable printer command) and
delete lines 2460, 2480, 2490 and
2500. Line 2220 keeps the program
from plotting a negative net worth.

When you choose the table op¬
tion to display data, the program
stops after two years. Press CONT
and ENTER to proceed.

Inverse graphics are:

990 DATA ENTRY 2999 SAVE DATA

1990 DISPLAY DATA 4000 INITIALIZE

Russell Crum, Canton, MI

14

TS 1000™/ZX8r OWNERS

• Improve programming and game playing, too!

• Easy to install - no wiring or soldering required

• Clear Vinyl with key-shaped openings and
adhesive backing.

TYPEX/81™ Keyboard

$5.95 + $1.50 P&H □□□□□□□□□□

_ [ □□□□□□□□□□

Order by mail or phone. ^

216/234-2662 • VISA & MASTERCARD welcome.

G ANH ART/E ARTHings

115 N. Rocky River Dr.* Dept. XI
Berea, OH 44017

DEALER/DISTRIBUTOR
INQUIRIES INVITED

15

12 issues
only* $29.95
Save $5.45!
Plus receive
free

y software
\cassette!

A new and unique magazine for the world’s
most popular personal computer

The best add-on
value for your ZX81 or
TIMEX SINCLAIR computer

Now that you’ve got a TIMEX SINCLAIR
computer make sure you get the new
magazine that helps you to get the most
out of it ... TIMEX SINCLAIR USER! And
take advantage of our special bonus of a
free software cassette ($15.00 retail
value) with each subscription.

TIMEX SINCLAIR USER is published
monthly. It keeps you totally up-to-date.
It helps you make full use of the power
of your computer.

TIMEX SINCLAIR USER covers the full
spectrum of user interests. Education.
Business applications. Home manage¬
ment. Games and family entertainment.
And TIMEX SINCLAIR USER does it in an
easy-to-understand style that’s
authoritative yet friendly.

Each issue is packed with articles and
information that help owners make use
of the power of their computer. News
about software releases. Reviews. Hard¬
ware developments. Reader question
and answer column. Eight pages of pro¬
gram listings in every issue. New and
unique user applications. How to pro¬
gram. Interviews. Special money saving
offers to readers.

In fact, all the latest ideas and informa¬
tion to ensure that new owners and ex¬
pert users never tire of their computer.

FREE BONUS WITH YOUR
SUBSCRIPTION

Packrabbit"
Retail value
$15.00

For any age
or experience

Remember: the TS1000 was designed
precisely for you. Whatever your age and
experience in computers, TIMEX
SINCLAIR USER can help you use the
power of your computer.

SUBSCRIBE NOW and take advantage
of our special offer. Only*$29.95 for 12
monthly issues postage paid. This
represents a $6.00 saving over regular
newstand prices. And remember, you
receive a FREE BONUS with every
subscription, a “Packrabbit” software
cassette ($15.00 retail value).

To order call

800-543-3000

Mail to TIMEX SINCLAIR USER, 49 La Salle Avenue, Buffalo, New York, 14217

TIMEX SINCLAIR 1000: the price and
technology breakthrough that finally
made computers affordable.

TIMEX SINCLAIR USER: the magazine
that helps you use the power of this
revolutionary computer.

Name

Address
City _

State

( ) Check

( ) Money order. Or charge to

Number

( ) Yes, I want to subscribe to TIMEX
SINCLAIR USER at the special rate of $29.95
for 12 issues delivered to my door. In addition I
understand I will receive the FREE software
cassette with my first issue.

Use the POWER within your reach!

TS1000

ZX81

A good reason to order now! Receive a
software program cassette of an ex¬
citing, new arcade game! “Packrabbit”
is a regular $15.00 retail value. Free with
subscriptions for a limited time only.

Ask for Operator 243. In Canada call
(513) 729-4300 and ask for Operator 243.

These numbers are for orders only. Have
your VISA, Mastercard ready.

U.S. dollars

Expiry _

Signature.

AD Code
S5

NO MORE BAD CASSETTE LOADS
with

THE Z-DUBBER

The frustration of trying to load a cassette program into your Sinclair
ZX80/81 or Timex 1000, is this what you really bought your computer
for? Why put up with It? Now you don’t have to. The Z-Dubber is a
small device which connects between your computer and cassette player,
improving your loading ease 100%.

The Z-Dubber also allows you to connect two tape recorders together, to
create perfect duplicates of your favorite cassette programs. The Z-Dubber
can be yours for $31.95 postage paid within the U.S., Canada & Mexico.
Add $2.50 additional for other postal areas. Visa & Mastercard welcome.

FOR CHARGE AND C.O.D. ORDERS

1(800) 227-3000 TOLL FREE

1(800) 792-0990 IN CALIFORNIA

ASK FOR OPERATOR 225

For additional information or service, call or write:

BYTESIZE MICRO TECHNOLOGY
FO BOX 21123 - DEPT. A - SEATTLE, WA 98111
(206) 236-BYTE

HARDWARE REVIEW

Product: ZX81 Keyboard

From: Memotech Corp.

7550 West Yale Ave.
Denver, CO 80227
303/986-1516

Price: $99.95 (assembled only)

When UPS delivered my new key¬
board, I hastened to see what mar¬
vel Memotech developed this time.

Inside I found a full-size key¬
board with legible, all-white ZX/TS
legends on the keys. The keyboard
duplicates Sinclair's keyboard, but
with full-travel keys and an extra
shift key in the top right corner.

It took longer to unpack the
keyboard than to connect it to the
computer. The keyboard attaches to
your edge connector via an inter¬
face in Memotech's standard product
housing. The "black box" sand¬
wiches between their other prod¬
ucts. Besides attractive to the
eye, the functional metallic blue

board is immune to the "wobble
and die" syndrome common to most
products connecting by the edge
connector. The 12-inch flat cable
between the keyboard and interface
gives the keyboard free movement.

All Memotech products are FCC-
approved so that no unwanted RF
emissions bother your TV or stereo.
I recommend it to anyone who values
his or her system enough to buy
only the best.

Jeff Pack, Seattle, WA

At SYNTAX we also enjoy our Memo¬
tech keyboard. I like the shift
key in the upper right corner — I
can delete or move the cursor with
just one hand. Contrary to Jeff's
report, we find the interference
level on TVs high. We use a moni¬
tor with little trouble. Also we
find another change from the origi¬
nal ZX/TS keyboard — the legends are
located a little differently. Each
key performs the same functions,
but the command appearing over a
key on the original now appears on
the key and below the other leg¬
ends. Those below keys are on the
key fronts. So you need to light
your keyboard from the front so you
can read the keys.

Our keyboard came with a
sticky row of keys on the right
side that we fixed by sliding the
circuit board left. Now the keys
operate smoothly. The connecting
cable is a little short, so you
must put your computer to the left
of the keyboard.

Said Fateh of Memotech tells
us that Bill Wright of Sinclair
Users' Network (SUN) called about
the TV interference. Bill sug¬
gested replacing the computer's
video cable with a good quality
coax cable, preferably gold-plated
at both ends. Memotech tested this
solution with a Radio Shack 59/U
(#15-1535) coax cable, not gold-
plated, $3.99. Said says it clears
up interference caused by any add¬
on. We have not tested it. — AZ

17

SAVE ON SAVE AND LOAD

Save about 15 seconds when you
save or load. Add this code some¬
where in your program (here shown
at end) to auto-save:

SAVE with RUN 9995. Each SCROLL
execution collapses the bottom
line? 22 rounds collapse the whole
display except last two edit lines.
In SLOW the computer takes a while
to unscroll to full screen.

Bob Berch, Rochester, NY

VENDOR REPORT AND NOTES

Has Frog Software, a recent SYNTAX
and SQ advertiser, croaked? We've
tried to get them on the phone for
over two weeks? now it's discon¬
nected. If you have unfinished
business with them, let us know.

Gwen Marsh of Brainchild reports
they are back-ordered on Kolor-
works. If you are waiting on an
unfilled order, call Brainchild
collect at 414/691-3903.

Memotech and its distributors have
advertised RS232 interfaces for
several -months, but no one has any
in stock. We suggest you check
periodically with Memotech at 800-
662-0949. They tell us to expect
interfaces in the next month.

According to a voice on Timex's 800
line, the first issue of Ramblings,
the Timex newsletter, is out. You
should get a free copy if you sent
in a warranty card to Timex.
Questions? Call 800-24-TIMEX .

Call Dilithium Press, Beaverton,

OR, at 800/547-1842 for orders and
info. Their latest. Using and
Programming the TS Computer, is due
out in June at $9.95. Someone an¬
swers tech questions at that number
on Tuesdays and Thursdays.

TIMEX 1000 COMPUTER
* OWNERS *

IF YOU OWN A 16K RAM MODULE
THEN YOU NEED A “CRASH GUARD”
TO HELP SOLVE YOUR WOBBLE AND
CRASH PROBLEMS

* NO DANGER BUMPING THE MODULE

* PROVIDES A SOLID WORK BASE

* MADE OF HEAVY GUAGE ACRYLIC

$19.95

ADD

$1.50 S. & H.

VISA OR MASTER CARD ACCEPTED

EXPENSE CUTTERS PRODUCTS, INC.
P.O. BOX 9543 RAYTOWN, MO 64133
(816) 353-1690

10 DAY TRIAL PERIOD
“SATISFACTION GUARANTEED"

TYPIT

Does your word
processor have these
features?

Our TYPIT program
does!

Character insert/delete
with or without line
wrap-around options,
Line insert/delete, Move
blocks of text, Scroll
up/down, Page forward
or back, Clear to end of
Line/page, Search for
text, Cursor control
including home-up,
printer support.

TYPIT is available on
York-10 cass.

n n

N w

HD IIH

II II

a ii

i " in » ■

■ N

Should you tire of word
processing, relax behind
a game of BIOCAL’s
Cribbage...our other
programs include
Checkbook, The Stock
Exchange Game, Klingon
Wars, and Biorhythm.
Programs are $10 on
cassette or $15 on
stringy floppy. For credit
card orders, call us:

Toll Free
(800) 237-8400
Ext. 70

Write for FREE CATALOG
or call (415) 892-1747
to Order by Mail.

Send check or money-
order to:

BIOCAL

SOFTWARE

340 Cypress Drive
Fairfax, CA 94930

18

i/noo'S

i tut I II i

Creations Inc.

Account

‘TOUCH-A-MATIC’

Your own PERSONAL OR SMALL BUSINESS ac¬
counting system. Contains refinements not usually
found in this type of program. “200 Transaction file”
can be SEARCHED, PRINTED or DISPLAYED. This
program has been throughly tested, and improved
through extensive use. m 4 Anc

ORDER No. 03-1022 $1995

$995

EZ-Loader

AUTOFILE

An ELECTRONIC FILING SYSTEM that can be used
for ANY type of data. Set up your own DATA-BASES
with this easy to use, menu-driven program with
AUTO-SEARCH facility. * 4 ftcn

ORDER No. 03-1021 *195U

BREAKOUT

Fast MACHINE CODE arcade-type game. If you
haven't tried THIS version, you haven’t played
“BREAKOUF on the ZX81/TS1000. * A

ORDER No. 03-4028 $1495

POWER
AT YOUR
FINGER TIPS!

ORDER No. 01-0007

KOPAICS “TOUCH-A-MATIC” gives you the power to
type more accurately and faster. It requires NO
WIRES, NO SOLDERING. It’s as easy as removing
the adhesive backing and pressing it into position.

LOADS & SAVES 16 K file in 26 seconds instead of
7 minutes! Cleans up signal for a cleaner load.

• STRONGER, SHARPER DIGITAL SIGNAL

• CLEANER, FILTERED POWER • ENCODES YOUR
PROGRAM AND/OR DATE • Save time/Save energy

• Baud rate increases from 250 to over 4000 bps. A

must for all ZX81/TS1000 owners. *onnc

ORDER No.04-1010 $OSf3a

COMPOSER

Enables you to play any tune through your T.V.
speaker, your cassette recorder or through an A.M.
radio. With ‘COMPOSER’ you can control the dura¬
tion of each note. And you can save your song on

ORDER No. 03-3012 $1995

G R A FIX

Draw and store complex images. Permits you to
create, mix, and save your own screen artwork. You
can mix graphics created with GRAFIX into another
program. By itself or on tape. This program is a
“must” for the CREATIVE PROGRAMMER.^ Mn-
ORDER No. 03-6005 $1495

Z-99™ (Improved ‘M’-Coder)

Now you can write MACHINE CODE PROGRAMS on
your ZX81/TS1000 with Z-99. The best true MA¬
CHINE CODE COMPILER for the ZX81/TS1000 com¬
puter. Simply write your new program in BASIC (or
load an EXISTING PROGRAM), press a key and Z-99
will automatically compile it into MACHINE CODE for
you. Give all your programs that SUPER— FAST pro¬
fessional look. Order Z-99 NOW to revolutionize your
programming. Once you try Z-99 you’ll never write
basic programs again!

ORDER No. 03-5271 $ 1095

ORDER FORM

TO AVOID DELAY PRINT CLEARLY
STOCK NUMBER AND DESCRIPTION

Dealer Inquiries Invited

MAIL THIS FORM WITH PAYMENT TO:

KOPAK Creations Inc.
119 Peter St.

Union City, NJ 07087
(201) 864-4410

HOW

NAME _

ADDRESS

CITY

STATE

PUCKMAN

up to $9.99 to $14.99 add$2.00
from $1 5.00 to $1 9.99 add $2.50
from $20.00 to $24.99 add $2.85

from $25.00 to $29.99 add $3.45
from $30.00 to $39.99 add $3.70
from $40.00 to $49.99 add $3.95
over $50.00 add $4.25

Superb fast moving MACHINE-CODE fun. Have an
exciting time playing this EXCELLENT version of the
popular arcade game. * 4 jaK

ORDER No. 03-4027 $1495

CHARGE

visa[

MASTER I — I

1 1 Sign

INTERBANK NO-

Total amount
enclosed or to
be charged to
my credit card

EXR DATE!

- MO YEAR

In Canada call Datronics (416) 496-2243

R.I.S.T. Inc. Announces

A FREE Subscription To Syntax Quarterly

Purchase A Parrot Speech Synthesizer You Will Receive:

A Subscription To Syntax Quarterly "$15.00 VALUE FREE"
Exclusive Phrase Finder Program "$5.00 VALUE FREE"
Speech Synthesis Instruction Manual "$10.00 VALUE FREE"
ACT IMOW And Also Receive A Talking Casino Game Cartridge
"$15.00 VALUE FREE"

WHY YOU SHOULD READ SQ

SQ brings you professionally written articles and reviews '
to keep you attuned to the finest products as well as the best
bargains for your dollar.

NOW, through this package deal brought to you by i
‘.S.T. Inc. and SQ, speech synthesis has become affor¬

dable. Man's most powerful means of communication are
yours.

HOW YOU CAN MAKE YOUR COMPUTER TALK.

The PARROT newly introduced by R.I.S.T., gives the
power of speech to Timex/Sinclair Computers. This simple
to use plug-in speech module is capable of generating all the
sounds in the English language. The combination of these
sounds, in the order of your choice, will generate an
unlimited vocabulary of words, phrases, and sentences as
well as an array of sound effects. Piggy-back

expandability allows other modules (eg. memory) to be
operating with the Parrot simultaneously.

Paul Donnelly had this to say in the April issue of Syntax:

"Documentation is professional..."

"Overall, R.I.S.T.'s Parrot is an excellent unit and per¬
forms up to and behond my expectations."

Many different applications can be shared among this
common software interface: GAME APPLICATION pro¬
grams for fierce competition between you and your com¬
puter can now be guided and accentuated with speech.
HOUSEHOLD APPLICATIONS: Relieve the pressure of
"one eye on the clock". Program your computer to give you
a call when your on a tight schedule and your time in the
shower is running out; call you when your roast is ready; tell
you when your favorite TV show is about to come on. The
possibilities are endless in solving every day problems.
EDUCATIONAL PROGRAMS: Generate a program for
your child, bringing the overwhelming simplicity of listening
and learning. YOU WILL ALSO RECEIVE:

An exclusive phrase finder program-FREE. This pro¬
gram enables you to select, string together and pronounce
your desired phrases. It makes editing of speech easy.

A 40 page speech synthesis manual-FREE.

*See how certain sounds can be used to give your computer
an unlimited vocabulary.

ACT NOW: receive a Talking Poker Game-FREE.

‘Mrrrcf

hear the power

SAVE $45.00

Send To: R.I.S.T. Inc.
Dept. 2-5 (Fomerly
Voicetech)

P.O. Box 499, Ft.
Hamilton Station

Brooklyn, N.Y.
11209 - (212) 259-4934

Please send me # _

Parrot(s) Speech Syn¬
thesizers for my □
ZX80 □ ZX81 □
TS1000 at $89.95 ea. plus
$4.00 sh/hd. I will receive a
FREE subscription to Syn¬
tax Quarterly along with the
exclusive phrase finder pro¬
gram cassette, the 40 page
instruction manual and the
talking poker game car¬
tridge; a $45.00 savings.

ORDER NOW
LIMITED TIME OFFER

RUNNING MC IN A STRING VARIABLE

You can place and execute ma¬
chine code (MC) in three places:

REM line, memory reserved above
RAMTOP, and a string.

Using a REM line lets you SAVE
the code, but listing it can upset
the system as it tries to interpret
values not designed for display.

Using memory above RAMTOP elim¬
inates the listing problem, but the
code won't SAVE. You must reserve
the memory and reinstitute the MC
each time you power up.

Using a string to store the
code eliminates these disadvan¬
tages. But take care not to des¬
troy the string variable. Also,
unlike the other methods, the
code's start address does not re¬
main constant; the system moves
variables as needed to accommodate
program and display space needs.

So don't use a string to execute MC
if during execution, the space used
by the programs or display changes.

Finding the string to execute
it is no problem if the string is
the first variable assignment in
the program. The first assigned
variable is always the first vari¬
able in the variable storage area,
no matter where that area may be.

To find that area, VARS, enter:

PEEK 164 00+PEEK 16401*256
The string's contents begin three
bytes beyond.

This program assigns Z$, which
holds the MC hex representation.
Here Z$ holds two concatenated
routines. The first 54 characters
represent the 27 decimal codes for
renumber. The rest is Syntactic
Sum. Line 2 finds VARS+3. Lines
3-6 PEEK the contents of line 1,
convert the character code to
decimal, and POKE it into the space
the Z$ assignment set aside in
VARS. The decimal code occupies
only half the space of Z$ — check by
PRINT Z$ after running — but Z$'s
length doesn't change.

RUN in FAST. It stops at line
7. GOTO 9990 to renumber the pro¬
gram lines by 10. It doesn't re¬
number GOTOs and GOSUBs. (After
renumber, Syntactic Sum is 20570.)

Renumbering does not alter pro¬
gram space because all line numbers
are held in two bytes.

If after running the program
you delete lines 1-7, remember that
RUN will wipe out the code. Ob¬
viously, do not reassign Z$.

Rolf Miller, Ventura, CA

20

TS1000 Support!

Software/Hardware/Books from GLSDSTOflE-^-ELECTROniCS

Wfii

Wrw0*m

f

I

•m f mi

A

i J

WL M

A

^Ats'ofe

Software

ZX Forth

A complete implementation of the FORTH language for the
ZX81 andTSIOOO computer.

FORTH’s most distinctive feature is its flexibility. The basic
unit is the word — the programmer uses existing words to de¬
fine his own which can then be used in further definitions.
FORTH is a compiled language so programs run very fast
(typically five times faster than BASIC).

ZX-FORTH is supplied on cassette and is accompanied by
extensive documentation:

56-page Users Manual 8-page Editor Manual

Z43 $29.95

Teach your children programming skills through a computer
graphics language. It’s easy and fun to use! Included with
your program is a comprehensive guide. (Tiny Logo is a sub¬
set of the popular MIT Logo) $19.95

KEYBOARD

with metal case

A full -sized professional keyboard for the ZX81
Features 47 keys and a full-sized space bar. Con¬
nects to the ZX81 with no soldering required, via a
plug-in flexible connector. You can purchase the
keyboard only, or the optional metal case that holds
both keyboard and ZX81. Expansion devices (i.e
RAM packs, etc) connect to the ZX81 edge-connec¬
tor which extends from the rear of the cabinet.

A professional keyboard makes program entry
easier and less error-prone.

Keyboard K70 $79.95

Metal Case for keyboard

and ZX81 E70 $25.00

GLADSTONE 64K RAM

Fastload allows you to save and load
programs at rates up to 6 times faster than
normal. Change your old programs into new
FASTLOAD programs and no extra equipment
is needed. 7ri ciqqc

Travel the world with your T/S1000 - ZX81 Computer. An¬
swer the 12 riddles and WIN! ZX48 $19.95

The Complete ZX81
and TS1000 Library!

Machine Code Monitor and Disassembler

ZXBUG is a powerful tool for machine language program¬
ming. It is 4K long and uses memory from 71 EO to the top
memory. ZX BUG works in hexadecimal (base 16), not deci¬
mal, so all addresses are a maximum of 4 Hex bits long. Pro¬
vides a total of 28 commands. 7/11 a qc

The Complete ZX81 Basic Course .

Basic Course Cassettes (2) .

Getting Acquainted with your ZX81 .

ZX81 Pocket Book .

Making the Most of Your ZX81 .

Computer for Kids, ZX81 Edition .

Explorers Guide to the ZX81 .

ZX81 Companion .

49 Exploding Games for the Zx81 .

Not Only 30 Programs for ZX81 : 1 K ...

Machine Language Made Simple .

Mastering Machine Code on your ZX81

ZX81 Rom Disassembly: Part A .

ZX81 Rom Disassembly: Part B .

Understanding your ZX81 ROM .

ZX Assembler

This Machine Code program occupies 7K of memory and lo¬
cates itself at the top of memory. The program is a full Editor/
Assembler and Monitor. Labels may be used instead of any
string. The features include Line Insertion/Delete, Insert
Characters, Auto Repeat on all keys. The Monitor has facili¬
ties to inspect memory, registers and run machine code pro¬
grams.

Expands the capacity of the T/S 1 000 or ZX81 to its
maximum. User transparent. G64 $149.95

Cramic-81

CMOS 16K Memory

Cramic-81 is a 16K RAM pack using CMOS technology for
permanent data retention. Data can be stored almost indefi¬
nitely and loaded almost instantly with virtually zero chance
of error. An ordinary Rampack can also be connected simul¬
taneously. The two RAM units then occupy the same mem¬
ory area but either can be selected. Two separate programs
can actually run alternately. ci ? $1 7Q

Z40 $14.95 - - — “

ORDER TOLL FREE
800-833-8400

In N.Y. (716) 874-5510

In Canada 1 -800-268-3640 Monday-Friday 9:00 am. - 1 :00 am E.S.T

Gtaasront

1585 Kenmore Ave.

ELECTROMG

Buffalo N.Y. 14217

Write for Gladstone’s

FREE CATALOG

Circle reader service number or write
(no phone requests please!)

New from Gladstone Electronics! Our
ZX81/TS1 000 catalog will take you
where no one has dared go before.!

You will view the widest selection of up-
to-date software, books and hardware
add-ons available to get the most from
your personal computer. This exciting
new 34 page color catalog lists arcade,
fantasy and family games, business
and educational programs; books for
1 beginners as well as experienced

I users; hardware add-ons and other

& peripherals for use with ZX81 /TS1 000

m Home Computer! Use the convenient
coupon and send for your FREE
catalog TODAY!

CHARGE TO:

| □ VISA □MASTERCARD

Quantityl Price I Total

ADDRESS _ ^

SHIPPING

CITY: STATE 7IP _ TOTAL

To: Gladstone Electronics, 1585 Kenmore Ave., Buffalo N.Y. 14217

In Canada: 1736 Avenue Rd., Toronto, Ontario M5M 3Y7

CANADA: PRICES MAY VARY

ZX/TS USERS1 GROUPS

To list your group or to find a
local one, call or write SYNTAX.

Columbus, OH: Gary Solomon, 1653
Brice Rd., Reynoldsburg, OH 43068,
614/861-3600 .

Guam: Sinclair/Timex Users Club of

Guam, Jerry N. Lorell, pres., POB
4011, Agana, Guam 96910.

Central Florida: Sinclair Computer
Club of Central Florida, Darrell
Stec, 650 N. Orange Ave., #428,
Orlando, FL 32801, 422-5131 x428
eves., or Dan Wolfe, 5058 Nadine
Dr., Orlando, 277-2905 eves.

Philadelphia, PA: Bell Telephone
Computer Club, Orvis Kline, 4th
FI., 1 Parkway, Phila., PA 19102,
215/466-4291 days, 876-0413 eves.

Tucson, AZ: Timex/Sinclair Users
Group, POB 41795, Tucson, AZ 85717.

CLASSIFIED ADS: Reach almost 9,000
users for $9/line. Send ad 35 char,
/line with ck. to arrive by 15th.
Inc. tel. #, whether or not it's in
ad. SYNTAX, BX 457, Harvard, MA 01451

PROWRITER PRINTERS: $399.95 ?? Yep!
Get free specs w/sample output now.
Tom Woods Box 64 Jefferson, NH 03583

NORDACK SOFTWARE-QUALITY ZX/TS 16K
Games-BLACKJK, CRAPS, HANGMAN $4-3/10
LIFE-An exciting visual display !!!
User sets scrn design and lets an
amazing algorithm go the work MC.$8
BARTENDER! Great at parties. Show
Friends. Store, retrieve up to fifty
drinks+ingredients . Nice display $8
Statistics+ Business Programs-$8 EA
REGRESSION- Forecasting -long term.
EXPONENTIAL-Forecasting-short term.
QUEUEING-Simulate waiting lines, etc
BREAKEVEN-Make sales, cost decisions
of business allocation problems.
PLOTTER-PLOT data pts. Sets axes.
!!!A11 progs documented fully !!!!!
PO BOX 4009 SILVER SPRING, MD 20904

***f or TIMEX/SINCLAIR computers***
NEW! "IN-LINE" LOAD MONITOR": Load
software like a pro! Guaranteed.

Compact. Detailed instruct. - 12.95

LOST IN SPACE - - 11.95

UNIVERSAL INVENTORY FILE - 16.95

UNIVERSAL MAILING LIST - 10.95

UNIVERSAL COIN COLLECTION— - 10.95

UNIVERSAL STAMP COLLECTION - 10.95

UNIVERSAL RECORD ALBUM COLL - 10.95

Each program on cassette + manual.
8KROM, 16KRAM. $1.50 S&H per order.
$1 for cat. (Refunded with order.)
N.J. 6% tax. WANTED: Retailers, Agent
and Dealers. M.C. HOFFMAN CO., DEPT.
SX4 , PO BOX 117, OAKLAND, NJ 07436

* *SALE ! - SALE! - SALE! - SALE! * *

LABYRINTH OF OAZXL IS THE ULTIMATE
Dungeon Game For 16K ZX81/TS1000 ! ! !
Treasure! Fight 50 Kinds Of Beasts
multilevel Graphics-Text Adventure!
Actually draws Rooms And Halls! WOW!
Tape $10: JLK SOFTWARE. 6 DUFFERIN
PL, ST. JOHN'S NFLD . CANADA AlA 2V1

******M-z SYSTEMS SOFTWARE******

If You Own The Z-81 or T-1000
You Must Own The M-Z LEDGER And The
M-Z LIST To Get The Most
From Your Computer. Only $21.95

Each Or For More Information
Send SASE To M-Z SYSTEMS, 1003
SOUTHCLIFF, PORTLAND, TX 78374.

FREE Program listing & NEW catalog
loaded with software/hardware, books
etc. Send two 20 stamps to;

JPR SOFTWARE, BOX 4155, WINTER PARK,
FL. 32793. Rush... LIMITED OFFER.

***** METAGRAPHICS *****
USE THE FULL GRAPHICS POTENTIAL OF
Your ZX81/TS1000 (16K RAM). 2048
CHARACTERS!! BASIC + M/C Gives You
Total Artistic Control. Send $12.95
******** CALLIOPE SOFTWARE ********
4130 COE DR. NE, ALBUO. , NM 87110

******* Mother's Day Gift *********
WORKING MOTHER'S DILEMMA.tmFour 2K
Games. $14.95 (6% tax CA res.) FREE
Color Catalog. 2-BIT SOFTWARE, SY4 ,
P.O. Box 2036, Del Mar, CA 92014
*** Charge Orders (619)481-3629 ***

22

ANIMATED FUN*CAVES OF ZULU, CALVIN
Glomb's Exciting Animated Adventure
Is Now Available For 16K Timex/Sinc
Only 19.95 + 2.00 S/H VISA/MC OK
STUART SOFTWARE 25381-G Alicia #316
LAGUNA HILLS CA 92653 (714)855-4753

PICKLE MAN & MS PICKLE MAN! Eat dots
& Pickle Monster! Both req IK only!
List $2 (for both!) PANERO SOFTWARE
3309 Lewis, Long Beachf Ca. 90807

OUR POLICY ON CONTRIBUTCI^^RIAL^™™™"

SYNTAX invites you to express opinions related to any Sinclair computer or
peripheral, or the newsletter. We will print, as space allows, letters discussing items
of general interest. Of course, we reserve the right to edit letters to a suitable length
and to refuse publication of any material.

We welcome program listings for all levels of expertise and written in either
Sinclair BASIC or Z80 machine code. Programs can be for any fun or useful
purpose. We will test run each one before publishing it, but we will not debug
programs; please send only workable listings. Programs submitted on cassette can be
tested more quickly and with less chance of error.

In return for your listing, we will pay you a token fee of $2.00 per program we
use. This payment gives us the nonexclusive right to use that program in any form,
world-wide. This means you can still use it, sell it, or give it away, and so can we.

We will consider submissions of news and hardware or software reviews. Please
keep articles short (350-400 words). Again, we reserve the right to edit accepted
articles to a suitable length. We will pay 7 cents per 6 characters, including spaces
and punctuation, for accepted articles.

When you send in programs for possible publication in SYNTAX, please
include the following information:

• How to operate the program, including what to input if it does not contain
prompts.

• Whether you can run the program over again and how.

• How to exit the program.

• The Syntactic Sum (program published in Feb. 81 and Jun. 81; send SASE
for a free copy).

• What RAM size program requires.

• What ROM program uses.

We pay for this explanatory text at the same rate as for articles in addition to
payment for the program itself.

If you want us to return your original program listing or article, please include
a self-addressed, stamped envelope. Otherwise, we cannot return submitted material.

**** TECHNICAL APPLICATIONS ****
Software for electronic CAD and
formulas. All in BASIC, on tape,
with comprehensive instructions.
Send SASE for a list of programs
and prices to: Softec, P.O. Box
432, Fairport, New York 14450

LAND THE SPACE SHUTTLE . (16K) VECtor
transformations simulate motion in
3-dimensions & test judgment/skill
Cassette $6. 95 "DO LOOPS" WORKSHOPS
209 Maple, Harleysville PA 19438

IN-LINE LOAD MONITOR: Load

software like a pro! - 12.95

IN-LINE VOLTAGE DROPPER: Computer
and Ram pack will run cooler with

fewer system crashes - 15.95

XN-LINE LOAD FILTER: Cuts hi-pitch

noise when loading software - 12.95

XN-LINE SAVE FILTER: Cuts hi-pitch

noise when saving or duplic - 12.95

PLASTIC RAM CLIP: End system crash

caused by loose Ram pack - 2.00

£LIG1T GUIDER: Clear vinyl keyboard

overlay with finger holes - 6.95

SPIRAL WRAP: Organize your computer

cables. 24 inch length - 2.00

N.J. 6% tax. $1.50 S &H per order!

M.C. HOFFMAN CO., DEPT.SX5

P.O. Box 117, OAKLAND, N.J. 07436

SYNTAX is published

monthly by a wholly-owned
subsidiary of The Harvard Group.

Syntax ZX80, Inc.

RD 2, Box 457, Harvard, MA 01451.

Telephone 617/456-3661.

12 issues, $29. Single issue, $4.

YES! Please send me 12 issues of SYNTAX for $29. 5.83

D My check for $29 is enclosed. □ Please charge my □ MasterCard
Make checks payable to: □ Diner’s Club □ American Express

SYNTAX ZX80, INC. O VISA □ Carte Blanche account

account number _

exp. date.

. bank number (MC only)

Publisher: Kirtland H. Olson
Editor: Ann L. Zevnik
Assistant Editor: Pamela Petrakos-
Wilson

Editorial Assistant: Pamela K. Vinal

© Syntax ZX80, Inc., 1983. All rights
reserved. Photocopying prohibited.
ISSN 0273-2696

signature _ _ _

Name _ _ Title _

Organization _

Address _ _

city - State _ Zip

Day PhoneJ - ) _ Evening Phone J _ )

I own a □ Sinclair ZX80 □ Sinclair ZX81

□ TS1000

Telephone orders call

617-456-3661

23

ZX PRINTER PAPER: Your order ships
same day. Super quality, exact size
+ save! 3-pack/$12ppd Can:U$14? E.
Alvarez PO Box 1025, Oviedo FL 32765

///////// keycap graphics. /////////

DRY-TRANSFERS That Give Your 1/2"
Keycaps Class: Blk. & Red: $7. DAY,
790 E. BIG BEAVER, TROY, MI. 48084

======== COTTAGE TECHNOLOGY =======

ACZ GENERAL LEDGER-Computer ize your
small business accounting. $30.95

REVERSE VIDEO KIT-Display white
letters on a dark screen. $10.95

Send a SASE for catalog.

COTTAGE TECHNOLOGY 5720 W. Little
York, Suite 178, Houston TX 77091

INTEGRATED DATA SYSTEMS
11 Brighton Av Toronto Ont M4M 1P3
16K $51.12, extra 16K $43.84, Kayde
Graphics bd $54.80, ZON-81 $49.28,
Graphicomp educational $11.92 ea,
P&H~ $1.50, VISA. 300 item Free list

PILOTS. "FLIGHT PLANNER" $11.95 +
$1.50 P&H. provides Fuel, Heading,
Distance & Time. "Weight & Balance"
$5.95 + 1.50 P&H. JM SOFTWARE 1852
APPLEFORD ST., OTTAWA, ONT.K1J 6T4

SEND SASE FOR SAMPLE NEWSLETTER
Cent. PA. Users Group.c/o W. Russell
RDl BX539 CENTRE HALL, PA 16828

Bolton Road, Harvard, Mass. 01451

Tl-E

H\R\ARD

GROCP

z

MAZOGS-MOTHERSHIP-KRAZY KONG-QSAVE
Memopak 64K-32K-16K-Keyboards-ZXAD
Free Catalog! Subscriber Discounts
"Z-WEST" PO BOX 2411, VISTA, CA.

2 Sample programs on cassette.
$2.00 Plus SASE. Programs,

3763 W. Crocus Dr. Phx, AZ 85023

** ADD MEMORY THAT WON'T FORGET! **
* KIT $31:90 SASE details: HUNTER *
*1630 Forest Hills Okemos MI 48864*

****** TREK TRIVIA ******
EXCITING 16K TREK LORE TEST TWO
Sided Tape: Side 1 Multiple Choice
Direct Answer On Flip Side.

Send $12.95 CK/MO To:F & J SOFTWARE
P.0, BOX 124 GREEN VILLAGE ,N .J . 07935

Do LIST, SAVE, mods, backups. Tape
for 8K ROM, 16K RAM. Life-Guar. New
low price $9.95,ppd. N.J. Gipson,

43 Imperial R.D.#6, Coates, PA 19320

TRY WINKY BOARD II AT NO RISK! Copy
ANY ZX/TS cassette, make LOADS easy
$24, $18 kit PPD. If not pleased in
10 days return for fast refund. Our
KEY CASSETTE LOADS & merges many
programs into one. SAVES ANY ZX/TS
cassette. $10 PPD. G. Russell, RDll
Box 539, Centre Hall, PA 16828

24

U.S. Postage
PAID

Harvard, MA
Permit No. 8
01451

f

First Class